-- --------------------------------------------------------------------------
--
-- Title      : Draft Standard VHDL 1076.1.1 Packages for Multiple Energy 
--            : Domain Support.
--
-- Library    : This package shall be compiled into a library symbolically
--            : named IEEE.
--
-- Developers : IEEE 1076.1.1 Working Group
--
-- Purpose    : This package contains declarations for modeling in the
--            : fluidic energy domain.
--
-- Note       :
--
-- --------------------------------------------------------------------------
--   Modification History :
--
--   Version   Date           Description
--     1.0     6 July 2001    Original version.
--     1.1     4 March 2002   FDL 2001 & BMAS 2001 revisions
--     1.2     31 Aug 2002    DAC 2002 revisions
--     1.3     30 Sep 2002    FDL 2002 revisions
-- --------------------------------------------------------------------------

library IEEE;
    use IEEE.FUNDAMENTAL_CONSTANTS.all;

package FLUIDIC_SYSTEMS is
   -- type declarations

   -- subtype declarations
   subtype PRESSURE     is REAL tolerance "DEFAULT_PRESSURE";
   subtype VFLOW_RATE   is REAL tolerance "DEFAULT_VFLOW_RATE";
   subtype VOLUME       is REAL tolerance "DEFAULT_VOLUME";
   subtype DENSITY      is REAL tolerance "DEFAULT_DENSITY";
   subtype VISCOSITY    is REAL tolerance "DEFAULT_VISCOSITY";
   subtype FRESISTANCE  is REAL tolerance "DEFAULT_FRESISTANCE";
   subtype FCAPACITANCE is REAL tolerance "DEFAULT_FCAPACITANCE";
   subtype INERTANCE    is REAL tolerance "DEFAULT_INERTANCE";

   -- attribute declarations
   attribute UNIT of PRESSURE     : subtype is "Pascal";
   attribute UNIT of VFLOW_RATE   : subtype is "meter^3/second";
   attribute UNIT of DENSITY      : subtype is "kilogram/meter^3";
   attribute UNIT of VISCOSITY    : subtype is "Newton-second/meter^2";
   attribute UNIT of VOLUME       : subtype is "meter^3";
   attribute UNIT of FRESISTANCE  : subtype is "Newton-second/meter^5";
   attribute UNIT of FCAPACITANCE : subtype is "meter^5/Newton";
   attribute UNIT of INERTANCE    : subtype is "Newton-second^2/meter^5";
   -- SYMBOL for abbreviation of UNIT
   attribute SYMBOL of PRESSURE     : subtype is "P";
   attribute SYMBOL of VFLOW_RATE   : subtype is "m^3/s";
   attribute SYMBOL of DENSITY      : subtype is "kg/m^3";
   attribute SYMBOL of VISCOSITY    : subtype is "N-s/m^2";
   attribute SYMBOL of VOLUME       : subtype is "m^3";
   attribute SYMBOL of FRESISTANCE  : subtype is "N-s/m^5";
   attribute SYMBOL of FCAPACITANCE : subtype is "m^5/N";
   attribute SYMBOL of INERTANCE    : subtype is "N-s^2/m^5";

   -- nature declarations
   nature FLUIDIC is
      PRESSURE    across
      VFLOW_RATE  through
      FLUIDIC_REF reference;
   nature FLUIDIC_VECTOR is array (NATURAL range <>) of FLUIDIC;

   -- vector subtype declarations
   subtype PRESSURE_VECTOR     is FLUIDIC_VECTOR'across;
   subtype VFLOW_RATE_VECTOR   is FLUIDIC_VECTOR'through;
   subtype VOLUME_VECTOR       is REAL_VECTOR  tolerance "DEFAULT_VOLUME";
   subtype DENSITY_VECTOR      is REAL_VECTOR  tolerance "DEFAULT_DENSITY";
   subtype VISCOSITY_VECTOR    is REAL_VECTOR  tolerance "DEFAULT_VISCOSITY";
   subtype FRESISTANCE_VECTOR  is REAL_VECTOR  tolerance "DEFAULT_FRESISTANCE";
   subtype FCAPACITANCE_VECTOR is REAL_VECTOR  tolerance "DEFAULT_FCAPACITANCE";
   subtype INERTANCE_VECTOR    is REAL_VECTOR  tolerance "DEFAULT_INERTANCE";

   -- attributes of vector subtypes
   attribute UNIT of PRESSURE_VECTOR     : subtype is "Pascal";
   attribute UNIT of VFLOW_RATE_VECTOR   : subtype is "meter^3/second";
   attribute UNIT of DENSITY_VECTOR      : subtype is "kilogram/meter^3";
   attribute UNIT of VISCOSITY_VECTOR    : subtype is "Newton-second/meter^2";
   attribute UNIT of VOLUME_VECTOR       : subtype is "meter^3";
   attribute UNIT of FRESISTANCE_VECTOR  : subtype is "Newton-second/meter^5";
   attribute UNIT of FCAPACITANCE_VECTOR : subtype is "meter^5/Newton";
   attribute UNIT of INERTANCE_VECTOR    : subtype is "Newton-second^2/meter^5";
   -- SYMBOL for abbreviation of UNIT
   attribute SYMBOL of PRESSURE_VECTOR     : subtype is "P";
   attribute SYMBOL of VFLOW_RATE_VECTOR   : subtype is "m^3/s";
   attribute SYMBOL of DENSITY_VECTOR      : subtype is "kg/m^3";
   attribute SYMBOL of VISCOSITY_VECTOR    : subtype is "N-s/m^2";
   attribute SYMBOL of VOLUME_VECTOR       : subtype is "m^3";
   attribute SYMBOL of FRESISTANCE_VECTOR  : subtype is "N-s/m^5";
   attribute SYMBOL of FCAPACITANCE_VECTOR : subtype is "m^5/N";
   attribute SYMBOL of INERTANCE_VECTOR    : subtype is "N-s^2/m^5";

   -- subnature declarations

   -- object declarations

   -- operation declarations (e.g., subprograms)

   -- alias declarations

end package FLUIDIC_SYSTEMS;